Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS Green Bay, WI

July 30, 2012Door County, Wisconsin

NWS Green Bay, WI issued this severe thunderstorm warning at Jul 30, 2012, 6:06 PM CDT for Door County, Wisconsin. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 30, 2012, 6:06 PM CDT (23:06 UTC)
Expired
Jul 30, 2012, 6:45 PM CDT
In force
39 min
Issued by
NWS Green Bay, WI
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Door County, WI

The radar

The Green Bay radar (KGRB), 130 km from the middle of the area, began a volume at 23:07 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 30, 1:28 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 11.1 hours before the alert went out and 130 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 12:00Z on 2012-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 455 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 2012-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
455 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
805 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
114 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

109 
WUUS53 KGRB 302306
SVRGRB
WIC029-302345-
/O.NEW.KGRB.SV.W.0079.120730T2306Z-120730T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREEN BAY WI
606 PM CDT MON JUL 30 2012

THE NATIONAL WEATHER SERVICE IN GREEN BAY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DOOR COUNTY IN NORTHEAST WISCONSIN...

* UNTIL 645 PM CDT

* AT 602 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR CEDAR RIVER...OR 24 MILES SOUTHWEST OF
  ESCANABA...AND MOVING EAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NEWPORT STATE PARK...ELLISON BAY...GILLS ROCK...ROWLEYS BAY...
  WASHINGTON ISLAND AND ROCK ISLAND STATE PARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL AND DAMAGING WINDS. MOVE TO AN INTERIOR ROOM OF YOUR HOME OR
BUSINESS. HEAVY RAINS CAN FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE MOVING WATER COVERS THE ROAD.

&&

LAT...LON 4533 8686 4533 8690 4530 8689 4528 8696
      4520 8698 4522 8702 4519 8703 4523 8713
      4530 8707 4529 8695 4531 8697 4532 8693
      4534 8697 4539 8697 4543 8694 4541 8684
      4544 8682 4542 8680
TIME...MOT...LOC 2306Z 290DEG 27KT 4543 8727
WIND...HAIL <50MPH 1.00IN

$$

TH
2 follow-up statements
591 
WWUS53 KGRB 302325
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
625 PM CDT MON JUL 30 2012

WIC029-302345-
/O.CON.KGRB.SV.W.0079.000000T0000Z-120730T2345Z/
DOOR WI-
625 PM CDT MON JUL 30 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN DOOR
COUNTY UNTIL 645 PM CDT...

AT 623 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 16 MILES NORTH OF NEWPORT STATE
PARK TO 9 MILES SOUTH OF CEDAR RIVER...MOVING SOUTHEAST AT 35 MPH.

SEVERE THUNDERSTORMS WILL BE NEAR...
  NEWPORT STATE PARK AROUND 645 PM CDT.

OTHER LOCATIONS IMPACTED BY SEVERE THUNDERSTORMS INCLUDE ROCK ISLAND
STATE PARK...WASHINGTON ISLAND...GILLS ROCK...ELLISON BAY AND ROWLEYS
BAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...LARGE HAIL...AND DEADLY
LIGHTNING. FOR YOUR PROTECTION...MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF YOUR HOME OR BUSINESS.

&&

LAT...LON 4533 8686 4533 8690 4530 8689 4528 8696
      4520 8698 4522 8702 4519 8703 4523 8713
      4530 8707 4529 8695 4531 8697 4532 8693
      4534 8697 4539 8697 4543 8694 4541 8684
      4544 8682 4542 8680
TIME...MOT...LOC 2325Z 297DEG 32KT 4545 8694 4527 8733
WIND...HAIL 60MPH 1.00IN

$$

TH
575 
WWUS53 KGRB 302348
SVSGRB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE GREEN BAY WI
648 PM CDT MON JUL 30 2012

WIC029-302358-
/O.EXP.KGRB.SV.W.0079.000000T0000Z-120730T2345Z/
DOOR WI-
648 PM CDT MON JUL 30 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DOOR COUNTY HAS
EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.  HOWEVER...SMALL HAIL AND HEAVY RAIN ARE STILL POSSIBLE 
WITH THESE THUNDERSTORMS.

REMEMBER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR 
CENTRAL DOOR COUNTY UNTIL 745 PM CDT.

LAT...LON 4533 8686 4533 8690 4530 8689 4528 8696
      4520 8698 4522 8702 4519 8703 4523 8713
      4530 8707 4529 8695 4531 8697 4532 8693
      4534 8697 4539 8697 4543 8694 4541 8684
      4544 8682 4542 8680
TIME...MOT...LOC 2325Z 297DEG 32KT 4545 8694 4527 8733

$$

DC

The office that day

Everything else NWS Green Bay, WI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 30, 4:36 PM CDTSevere Thunderstorm WarningGRBMarinette24 min
Jul 30, 5:28 PM CDTSevere Thunderstorm WarningGRBBrown, Oconto47 min
Jul 30, 5:32 PM CDTSpecial Marine WarningGRB51 min
Jul 30, 5:50 PM CDTSevere Thunderstorm WarningGRBBrown40 min
Jul 30, 5:58 PM CDTSevere Thunderstorm WarningGRBBrown, Door, Kewaunee62 min
Jul 30, 6:04 PM CDTSpecial Marine WarningGRB86 min
Jul 30, 6:36 PM CDTSevere Thunderstorm WarningGRBBrown39 min
Jul 30, 6:44 PM CDTSevere Thunderstorm WarningGRBDoor61 min
Jul 30, 6:49 PM CDTSpecial Marine WarningGRB116 min
Jul 30, 6:53 PM CDTSevere Thunderstorm WarningGRBKewaunee, Manitowoc37 min

Nearby

Severe Thunderstorm Warnings in Wisconsin, 2012Every severe thunderstorm warning in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.